Source : Webster's Revised Unabridged Dictionary (1913)

Stridulate \Strid"u*late\, v. t. [See {Stridulous}.]
   To make a shrill, creaking noise; specifically (Zo["o]l.), to
   make a shrill or musical sound, such as is made by the males
   of many insects.

Source : WordNet®

stridulate
     v : make a shrill creaking noise by rubbing together special
         bodily structures; "male insects such as crickets or
         grasshoppers stridulate" [syn: {clitter}]